Method and apparatus for casting rolls



Filed Jan. 10, 1921 INVENTOR Patented May 15, i923.

UNITED STATES PATENT E WILLIAM H. NICHOLS, OF WILKINSBURG, PENNSYLVANIA.

A METHOD .AND. APPARATUS FOR CASTING ROLLS.

Application filedJanuary 10, 1921. Serial No. 436,313.

To all whom it ma/y concern: a

Be itknown that 1, WILLIAM H. NICHOLS, a citizen of the United States,and resident of VVilkinsburg, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in Methods andApparatus for CastingRolls; andI do hereby eclare the following to be afull, clear, and exact description thereof.

Myinvention relates to a method of cast- This constant tipping oftheladle results-in a waste of metal as the pouring can never be done soaccurately as not to allow more or less of the metal to spill or slop.over, and furthermore each mold .must be provided with a pouring gatewhich is filled up with metal and this metal has to be remelted forfurther use.

The object of my invention is to provide a method in which a number ofeconomies are effected and to these ends it consists, generally stated,in forming a plurality or group of molds for casting rolls around acommon pouring gate so that the metal for a number of rolls is pouredinto one gate, and the necessity for tipping the ladle for pouring theindividual molds is done'away with.

, In the accompanying drawing, illustrating suitable apparatus forcarrying out my improved method, in which Fig. 1 is a vertical sectionon the line 11, Fig. 2; and g 2 is a cross section on the line 2-2 Inthe drawing the numeral 2 designates the lower box or drag which restsupon the molding floor 3, and this lower box is filled with sand inwhich a wood pattern is molded which forms the coupling and neck of theroll in the ordinary manner. The lower box 2, as illustrated, has fourneck-molds 2*, although it is apparent that any number may be employed.These neck-molds are connected by the passages 4 with the central partof the box, and the sprue runners 5 radiate from the central portion 015the box to the molds, saidrunners being formed in the sand 6 and enterthe molds 7 tangentially, so as to give the proper swirl to the metal inpure iron is carried toward the periphery or face of the mold and thesullage will concentrate in the center.

-Resting on the flanges 8 of'the lower-box 2 and connected thereto byclamps 9 held in place by wedges 10 are the chills 11 of the ordinarytype. Resting on the chills 11 are the upper-boxes 12 containing thesand 13 in which themold for the upper roll-neck The customary andcoupling is formed. 3 head 14 is provided in whichthe impurities of ironwhich rise tothe top in casting are collected.

pouring, by which the heavy and Resting on the lower box 2 is thepouringgate 15 at the upper end of which is secured the funnel 16 forconvenience in pouring.

When a group or plurality of rolls are formed, in the above manner, themetal is drawn from the cupola or open-hearth turnaceinto the ladlecarried by an overhead crane and the ladle is then moved into positionfor pouring a group of molds and tilted to allow themetal to enter thefunnel 16 whence it passes down through the gate through the radialchannels 5 into the lower ends of the molds. The metal, as stated, isgiven a swirl and rises within the mold until the mold is filled, theimpurities gathering in the head 14 at the top.

By pouring a plurality of molds at one time the ladle is only tippedonce and the pouring of the molds is accomplished in less time, andfurthermore the metal does not have an opportunity to cool ofi' whereone continuous pour is made so that the molds are all poured with metalof the same temperature and under exactly the same conditions whichinsures a uniformity of product.

There is furthermore a great reduction in the waste of metal due to thefact that there is less chance of the metal dripping and slopping over,which occurs each time the ladle is tipped in the pouring of singlemolds, and as there is only one pouring gate there is a reduction in theamount of metal necessary to pour the molds as distinguished from theold method where each mold had its individual pouring gate.

It will be observed that the upper surface of the sand in the drag flaskis substantially all covered by the lower flanges of the chills the sandfrom beinglifted above the run ners 5Wl1ll6 the metal is being poured.What I claimis: I

1. The method of casting chill r0115 that comprises arranging-adjacentto a common pouring gate a plurality of molds each having a separate andindependent chill, pouring molten metal into said gate, and directingsaid metal tange itially into the lower enises. of saidmolds ,2. Themethod of casting chill rolls that coinprlsesflarrang ng around a commonpouring gate a plurality of molds each h avingi'a separate andindependent chill, providing runners communicating with said e-115mggate' and opening tangent ally into said molds, and pouringinto'saidgate,fvvithout interruption, enough metal to fill all of said molds; r

5. Apparatus" for castlng chill r ollscom prising a drag 'having aplurality, of neck cavities formed therein, an upright pouring r gate,sp'rue runners extending from said runners extending radially from thelower pouring gate and opening tangentially into said neck cavities, andseparate andi in de pendent'chill's mountedupon said drag above saidneck cavities.

4. Apparatus 01 casting chill rolls comprising a drag having a pluralityof, neck cavities jfformed therein, an u'p'ijight pouring gate disposedcentrally upon said drag, sprue end of Said pouring gate aiid' openingtan gen'tl'ally nto saidneckf cavit es, and separate and independentchills mounted upon d rae b Ye aeekiqavit e a H App r t s; a; aring, h lm sw prising a drag box having a plurality of generally circularrecesses arranged symmetrically around a' common center andcommunicating with a central space through straightpassages;arilldkbavity molded Withinea ch ofsaid reeesses, an uprightpouring gate disposed centrally upon said drag, sprue runners extendingfrom the lower ort ion;

of said pouring ia nd thiiough said a straight passag'esin said drgflboieigid runners? opening tangentially into said; neck a s; end'csepdeit fend i dep ee i lls.

mount ed upon said drag abQveHsa-id neck cavities. v p

6, Apparatus for a drag box having] 1 recesses arr ange'd symmetrica biy f ll d 521' common center and communicating ,vvith a tral, 5 space f ironglg; straight pas v neck cav ty molded tlnn each off said res es, llp F ghtigQl r llg: ate,d spo dp e tra'lly upon said drag, spn e runn rsextendg r d el frem t e lei P 1 93 9i id P g 13 1 t 'quel ,s i v s m hpe sages in s'aid drag box" said runners? open-j, ingtangentially intosaid' neclr cavities, andj pe ts a d 1 9Pi nt-- 1i ls im p s vi i ab veit ffrieqk av tie V In testimony whereof I,"thjsajidWl[1iiLrlmi H.NmHbLs; have hereunto" set hjanch WILLIAM NICHOLS;

Witnesses N Wee:

RoBi D. Tor rnN.

